The Respiratory Syste2

The Respiratory Syste2 - The Respiratory System Lungs There...

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The Respiratory System Lungs There are two lungs. The airway passages of the lungs branch and decrease in size. The primary bronchi form the secondary bronchi, which go to each lobe of the lungs. The secondary bronchi form the tertiary bronchi, which go to each bronchopulmonary segment of the lungs. The tertiary bronchi branch many times to form the bronchioles. The bronchioles branch to form the terminal bronchioles, which give rise to the respiratory bronchioles, from which alveolar ducts branch. Alveoli are air sacs connected to the alveolar ducts and respiratory bronchioles. Important features of the tube system. The epithelium from the trachea to the terminal bronchioles is ciliated to facilitate removal of debris. Cartilage helps to hold the tube system open (from the trachea to the bronchioles). Smooth muscle controls the diameter of the tubes (especially the bronchioles). The alveoli are formed by simple squamous epithelium, and they facilitate
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This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

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The Respiratory Syste2 - The Respiratory System Lungs There...

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